A Warning message in AFT xStream

Full Message is:

Flow may not be balanced at Junction X (total = Y)

 

This warning alerts users that the converged mass balance results may be incorrect for the AFT Arrow Steady Solution. Once a converged solution is obtained, AFT xStream checks all junctions to ensure a mass balance exists. It compares the imbalance to the flow tolerance, and when the imbalance exceeds the tolerance, this warning is generated.

If the magnitude of the flow imbalance is close to the tolerance specified, it may be safe to ignore this warning, although it likely make sense to reduce tolerances further and rerun the model.

If the magnitude of the energy imbalance is large, the converged solution that may be incorrect. When a large imbalance exists, it may be an indicator the model is not realistic.

These warnings should always be reviewed in detail, and the user should perform hand calculations on the energy balance at the affected junctions to verify whether an acceptable solution exists.